This is the main 4th Marine Division report on Iwo Jima for this time period.
"Operations report of the Fourth Marine Division in Iwo Jima from February 19 to March 16, 1945. Including sections: planning and preparations, movement to objective, ship to shore movement, narrative of operation, progress of attack, and comments and recommendations."
There are also supplemental reports:
Digitized by the Combined Arms Research Library Digital Library, US Army Combined Arms Center. http://cgsc.cdmhost.com/cdm/